High light hot spot eliminating method using for visual convex shell drawing and device thereof

A bright spot and convex hull technology, which is applied in the field of highlight spot removal methods and devices, can solve the problems of increased drawing calculation amount, complex object color and texture, and difficulty in application, achieves simple and efficient calculation, and eliminates highlight spots. Effect

Inactive Publication Date: 2009-09-02
PEKING UNIV
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  • Abstract
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Problems solved by technology

There are unavoidable problems in this rendering method: the complexity of real objects and scenes is difficult to accurately describe with simple geometric elements, and the increase in scene complexity will significantly increase the amount of calculation for rendering
Another type of method can eliminate the highlights on a single image by modifying the image gradient field, but generally it can only achieve better results for areas with a relatively single background
In the process of drawing the visual convex hull, the reference image sequence used to generate the convex hull is often as many as dozens of images, and the color and texture of the object are usually complex, so the above methods are difficult to apply

Method used

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  • High light hot spot eliminating method using for visual convex shell drawing and device thereof
  • High light hot spot eliminating method using for visual convex shell drawing and device thereof
  • High light hot spot eliminating method using for visual convex shell drawing and device thereof

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Embodiment Construction

[0037] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0038] Such as figure 1 As shown in the image-based visual convex hull method, the input of its rendering process is a set of reference images taken around the object. The input image sequence should have the following characteristics:

[0039] 1. All images are sorted according to the spatial position of the camera when shooting;

[0040] 2. Every two adjacent images should have overlapping parts;

[0041] 3. The entire image sequence can contain all orientations of the object.

[0042] Through the method of camera calibration, the internal and external parameters of each reference image camera can be obtained. Then using image segmentation and other methods, the foreground object can be separated from the background, and the two-dimensional outline of the object on each reference image can be obtained. Using this information, a vis...

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Abstract

This invention relates to an elimination method for high brightness spots and its device used in drawing visual convex hulls, which eliminates high brightness spots in an image to get non-high brightness image sequence finally with the help of calibration information of an image collection device and redundant information of image sequences in drawing visual convex hulls including the following steps: picking up images of the high brightness spot, searching for corresponding sub-image in other reference image and re-sampling the image to further process the re-sampled sub-image seamlessly. This invention also provides a related hardware device.

Description

technical field [0001] The invention belongs to the technical field of computer graphics and virtual reality, and in particular relates to a method and a device for eliminating high-light bright spots used in visual convex hull (Visual Hull) drawing. Background technique [0002] An important goal of 3D computer graphics is to draw realistic images of 3D scenes in the computer. The traditional geometric model-based rendering method describes the scene as basic geometric primitives, then defines the distribution and properties of the light source, the surface material and reflection characteristics of the object, and finally generates a virtual composite image through the calculation of the rendering formula. There are unavoidable problems in this rendering method: the complexity of real objects and scenes is difficult to accurately describe with simple geometric elements, and the increase in scene complexity will significantly increase the amount of calculation for rendering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/10G06T5/00
Inventor 冯洁陈亮周秉锋
Owner PEKING UNIV
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